package com.jiang.stream.service.impl;

import com.jiang.stream.service.IMessageProvider;
import org.springframework.cloud.stream.annotation.EnableBinding;
import org.springframework.cloud.stream.messaging.Source;
import org.springframework.messaging.MessageChannel;
import org.springframework.integration.support.MessageBuilder;

import javax.annotation.Resource;
import java.util.UUID;

/**
 * @Author: Jiang
 * @CreateTime: 2022-08-26  21:51
 * @Description: TODO
 */
@EnableBinding(Source.class) // 可以理解为是一个消息的发送管道的定义
public class MessageProviderImpl implements IMessageProvider {

    @Resource
    private MessageChannel output; // 消息的发送管道

    @Override
    public String send() {
        String serial = UUID.randomUUID().toString();
        this.output.send(MessageBuilder.withPayload(serial).build()); // 创建并发送消息
        System.out.println("================ serial: "+serial);
        return serial;
    }
}
